Speed-indicator.



PATENTED OCT, 3.1, 1904;.

J. HEYDE.

INDICATOR.

APPLIOATION FILED NOV. 2, 1902.

SPEED 3 SHEBTSSHEET 1.

NO MODEL.

PNN w N kw No. 771,980. PATENTED OCT, 11, 1904. J. HEYDB.

SPEED INDICATOR.

APPLICATION FILED NOV. 2, 1903. N0 MODEL. 3 SHEETS-SHEET a.

NN m Patented October 11, 190%..

PATENT OFFICE.

JULIUS HEYD E, OF ZURICH, SIVITZERLAND'.

SPEED-INDICATOR.

SPECIFICATION forming part of Letters Patent No. 771,980, dated October 11, 1904:.

Application filed November 2, 1903. Serial No- 179,54=4. (No model.)

To all whom it may concern:

Be it known that I, JULIUs HEYDE, a subect of the German Emperor, residing in Zurich, Switzerland, have invented certain new ing drawings, and to letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to speed-indicators, and more particularly to that class of indicators known as recording-tachometers, by which the speed is recorded by a diagram made on a ruled strip of paper, and has forits object novel features of construction whereby the speed will be accurately indicated on a dial and recorded on a traveling strip of ruled paper, as will be particularly described in the following specification and claims.

Referring to the drawings, in which like parts are similarly designated, Figure 1 is an elevation of a full-sized machine, the casing being cut away on a vertical longitudinal central plane. Fig. 2 is a plan View of the operating mechanism, the upper frame-plate being removed. Fig. 3 is a similar view just below the central plate. Fig. i is an elevation looking in the direction of the arrows Figs. 2 and 3. Fig. 5 is a top plan View of the device one-half size and showing the casing open. Fig. 6 is a section of the side casing C and door E, showing the interior mechanism in top plan view. Fig. 7 is a plan View of the positive driving mechanism for the main pinion; and Fig. 8 is a plan view of the friction-disk, the upper half being milled and the lower half prepared ready for milling.

The mechanism is included between and supported by three frame-plates a, b, and 0, held distanced from one another by suitably-positioned posts 10, and comprises a time-train or clock mechanism independently wound, or preferably wound automatically from a moving element, to drive a continuously-rotating disk, which disk drives a friction-roller secured to a worm. The worm is laterally moved in one direction and rotated by the frictionwheel so as to travel in an opposite direction, the differential movement, or rather when the two speeds neutralize one another, that position of the worm indicating the speed of the element or machine to be measured. These mechanisms are driven from a main shaft and pinion, as well as the recording-strip of paper, as will be described.

The main driving-shaft 11 has a ratchet connection in the cylinder 12 with the main driving-pinion 13. From this pinion is preferably wound the clock mechanism that drives the disk 38. However, as already stated, the clock mechanism can be independently wound; but I prefer the present structure. This pinion 13 gears with wheel 11 on arbor 15, having bearing in the frame-plates b and 0, and on this arbor is a pinion 16, that rotates a wheel 17, that drives by pins 18 one element of a friction-clutch 19, said clutch being connected to a driving-wheel 2O, meshing with an intermediate gear 21, pivoted at 22, that gears with one 23 on the arbor 24L of the spring-drum 25, to which arbor one end of the spring is connected, as is customary, the other end of the spring being connected to the barrel. On this arbor 2 1 is a ratchetwheel 26, engaged by a spring-held pawl 27, pivoted in a bracket 28 on the frame-plate c. This structure compels the rotation of the barrel and prevents the partly-wound spring from urging the aforementioned gears in a reverse direction, while the friction-clutch prevents the overwinding of the spring. The spring-barrel carries a gearwheel 29, that engages a pinion 30 on an arbor 31, on which is also a transmission-gear 32, that drives a pinion 33 on the shaft 3et, that carries the disk 35. The transmission-gear 32 also drives a step-up train of gears, as follows: pinion 36 on arbor 37 carrying gear-wheel 38, meshing with pinion 39 on arbor 10, that carries gearwheel 41, both of said arbors 37 and 10 journaled between a bracket 41-2 and the lower frame-plate c. Gear-wheel 4C1 meshes with pinion 13 on arbor 14, journaled between bracket 4L6 and the frame-plate c, and carries a wheel 15, gearing with pinion 16 on the governor-shaft L7, journaled between the plates 5 and c. This shaft carries two spring-arms 48, having weights 49 at their ends provided with rubbing faces 50, of leather or other suitable material. Concentric to the shaft 47 is a ring 51, secured to the under face of the middle frame-plate 5, against the inner periphery of which the rubbing surfaces of the governor-weights will contact when the speed of the connected mechanism is too great. The main pinion 13 also gears with a wheel 52 on an arbor 53, journaled between bracket 46 and the lower frame-plate, and carries a pinion 54, that drives a wheel 55 on a shaft 56, journaled between the upper and lower frameplates (4 and 0 and passing through a slot 57 in the middle frame-plate b. This shaft 56 also carries a gear-wheel 58, that meshes with one 59 on an arbor 60, journaled between the upper frame-plate a and a bracket 61, secured to the under face of the upper frameplate a. The shaft carries a worm-wheel 61, that engages the worm 62.

Depending from the upper frame-plate a are two oppositely-situated brackets 63 and 64, and supported between them is a guiderod 65 and a shaft 66, having a slot 67.

The worm 62 is rigidly connected to a friction-wheel 68, and both are slidable on the shaft 66, but held from rotating independently of the shaft by a feather or screw sliding in slot 67. A bracket 69, having two arms 70, through which pass the guide-rod 65 and the worm-shaft 66, is slidable with the worm and friction-wheel, said worm and friction-wheel being included between the arms of the bracket. On the bracket is a rack 71, that gears with a pinion 72 on an arbor 73, mounted between the upper frame-plate a and a bracket 74, secured to said frame-plate. The.

arbor carries a wheel 75, meshing with one 76, mounted ona screw 77 in the upper frameplate a. This wheel 76 turns a wheel 78 on an arbor 79, on which is mounted the indicator-hand 80.

Attached to the sliding bracket 69 is a chain 81, passing over a guide-pulley 150, mounted in bracket 151, said chain then passing through a slot 82 in the middle frame-plate to a small drum 83, mounted on a shaft or screw 84, held in a bracket 85. On the drum 83 is a wheel 86, gearing with a rack 87 on one leg of a yoke 88, the other leg of which carries a stylus 89. Connected to the wheel 86 is a coil-spring 90, surrounding the screw 84 and held thereon by asmall disk 91, the object of this spring being to oppositely turn the wheel 86 when tension on the chain 81 is reduced, and thereby move the rack, yoke, and stylus to its Zero position. The leg of the yoke that carries rack 87 is slidable between guides 95, screwed to a bracket 96, secured to the bottom frameplate 0, said leg carrying at its end a frictionroller 97, pivoted in aslot 98, said roller bearing on the inside of the sheet-metal casingA, said casing passing between the legs of the yoke and acting as a supporting-surface for the paper strip.

The stylus is urged against the-paper strip by a small springin casing 92 ina well-known manner, while a pin 93, slidable in a rightangled slot 94 in casing 92, permits the stylus to be held out of operative position when desired and when inserting the paper strip.

Returning again to shaft 56, it will be seen that it carries a bevel-wheel 99, meshing with one 100 on ashaft 101, journaled in a bracket .102, secured to the middle plate 5. The shaft 101 carries a worm 103, that rotates a wheel 104 on an arbor 105, journaled between the upper frame-plate a and a bracket 106 secured thereto. The arbor 105 carries a pinion 107, that transmits motion by gear 108 and 109 to a wheel 110 ona drawing-off roll 111, having pins 112. This roll at its lower end, Figs. 1 and 3, carries a gear 113, meshing with one 114, that engages wheel 115, meshing with one 116 on the winding-on spool 117 to drive said spool. The winding-0E spool is situated in the side casing B and comprises a fixed pin 118, a bottom head 119 revoluble thereon, and

a removable revoluble upper head 120, carrying a spring-spider 121. The pin 118 is provided at its upper end with'a circumferential groove 122, in which takes a clip 123, pivoted on a screw 124 in the upper head. The paper P is wound on wooden bobbins or cardboard cores that slip over the pin 118, the free end of the paper being carried under the stylus,

around the curved surface of the main casing A and past drum 111, around a fixed pin 125 in side casing C to a similar wooden bob- I bin or core on the pin 117 of the winding-on spool, that has a removable upper head in all respects similar to that on the winding-off spool.

On the casing is an oil-cup126, from which lead tubes 127. 128, and 129, the one 127 terminating above grooves 130 in the top face of the middle frame-plate b, that oil the upper ends of the arbors journaled in the middle frame-plate, the one 128 terminating above the grooves 131 in the upper face of the lower frame-plate c, and the one 129 terminating over bracket 46, there being a short pipe 132 from duct 130, terminating over bracket 42.

The disk-shaft 34 is axially slidable to a slight degree in its bearings in the middle and lower frame-plates, so that the disk on its end is held against the friction-wheel 68 by a concentric spring-spider 133 between the disk 35 and the middle frame-plate b. The upper face of the disk is covered with a suitable material 134,-as leather, and carries at its periphery studs or projections 135, that take against a stop 136 on the bracket 69.

In order to allow the main driving-pinion 13 to be driven in one direction only, the shaft 11 is provided on its end with a plate 137, carrying two pawls 138, held by springs 139, said pawls engaging-a ratchet-wheel 140 on shaft 141, that carries the main drivingpinion 13.

The side casings B and C are opened by hinged doors D and E, respectively, the door D being provided with a roller 142 to hold the running off paper against the casing A just before it passes under the stylus, while the door E is provided with a roller 143, having upper and lower grooves 144, registering with pins 112 on the drawing-roll 111. This roller 143 is journaled in arms 145 at each end, that are pivoted on a rod 147 in the door E and held by a coil-spring 148, so that the prolongation of one of the arms 145 is normally against the casing-door E, while the end of spring 148 also presses against the door. This structure yieldingly holds the paper in engagement with the pins 112 on the drawing-off roll 111. The doors of the easing are held closed by a pin passing through eyes 149.

The tops of the two spools are removed and the wooden or pasteboard core or bobbin is placed on winding-off spool 118,.the top replaced, and the free end of the paper strip is passed under the stylus, partly around the main casing A and pin 125 to a similar bobbin or core on the spindle 117 of the windingon spool, and the top of the latter spool is secured in place. The shaft 11 is then rotatively Connected to a moving element of an automobile or other device the speed of which is to be indicated and recorded, so that in forward travel or motion the pawls 138 will engage the ratchet-wheel 140 on shaft 141 to rotate the main driving-pinion 13, which by gears 14, 16, and 17 will rotate the frictionclutch 19 and this in turn through gears 20, 21, and 23 wind the spring in barrel 25, which barrel, urged by its spring, will impart movement to the disk by gears 29, 30, 32, and 33, the speed of the disk being controlled by the governor connected to gear-wheel 32 by the follow-' ing step-up train 36, 38, 39, 41, 43, 45,47, thereby obtaining a practically uniform rotation of the disk 35. The main pinion 13 then communicates movement by the following train 52, 54, 55, shaft 56, gears 58 and 59 to worm-wheel 61. This will move the worm 62, the friction-wheel 68, with the bracket'69, along the slotted shaft 66, so as to move the friction-wheel toward the circumference of the uniformly-rotating disk. The rotating disk will rotate the friction-wheel and worm to cause it to travel along the slotted shaft in a direction opposite to that in which it is moved by the worm-wheel. The greater the speed to be measured the farther and faster will the worm and frictionwheel be moved toward the periphery of the disk, so that the friction-wheel and worm will be correspondingly rotated at a faster speed, being nearer the periphery of the disk, to neutralize their lateral'movement caused by the worm-wheel 61. It will be observed that the rack 71 on the bracket'69 partakes of all the movements of the worm, so that the greater the speed the greater will be the movement of this rack toward the periphery of the friction disk, thereby rotating the following wheels 72, 75, 76, and 78 on the index-hand arbor 79 to rotate the index-hand. The chain 81 will be pulledan equal extent to rotate the drum 83 and gear 86, thereby raising the stylus. The shaft 56, bevel-wheels 99 and 100 being in rotation, rotates screw 103, that drives gears 104, 107, 108, 109, and 110 on the drawing-off roll 111, the pins 112 of this roll taking into the paper to draw it off the winding-off spool and under the stylus. From the lower gear 113 on the drawing-off roll movement is communicated by gears 114, 115, and 116 to the winding-up spool.

Should the speed indicated be relatively high and then drop, the worm 62 and frictionwheel 68 will not' be moved so fast laterally, so that at the moment of the change of speed the friction-wheel 68 will be farther toward the periphery of the friction-disk 35 than is required, so that the worm will be rotated slightly faster than is required to maintain it stationary with respect to its movement along the shaft. The result will be to draw the worm and friction-wheel nearer the center of the disk, where that rotation of the worm tending to move it in one direction will neutralize the speed with which the worm is moved laterally by the worm-wheel 61, thereby indicating the new lesser speed, the index-hand being correspondingly moved by the rack and intermediate'gears, as indicated above.

Instead of making the friction-roller 68 of brass I prefer to make it of steel, milled on the contact-surface, and have it contact directly with a steel disk, also having a similarly-milled surface, thereby preventing the frequent renewals of the leather friction-surfaceon the disk. The milling of the surface is accomplished by forming teeth whose edges are smoothed between the rings, or the milling may be done in any other manner, as by a chasing-engine. Fig. 8 clearly shows this structure, the upper half finished, the lower half ready for milling. The smooth disk35 has a number of concentric grooves 35 cut into it about a millimeter apart. Then the milling-tool is run around the plate between the grooves, so as to form on the surface of the plate concentric milledrings 35", the teeth being so formed that nowhere on the surface of the disk will there be a continuous line of them from the circumference of the disk to its center.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is-

1. In a speed-indicator, the combination with a worm and a friction-wheel secured thereto, said worm capable of two distinct movements, one a movement of rotation about its axis and the other a bodily movement along said axis; of mechanism to impart bodily movement to the worm from the element whose speed is to be measured, a rack bodily movable with said worm and friction-wheel, a rotating friction-disk positioned to rotate said frictionwheel and worm at varyingspeeds dependent upon the position of the friction-wheel between the center of the disk and its periphery, an index-hand and gearing between the rack and index-hand, substantially as described.

2. In a speed-indicator, the combination with a worm mounted so as to be capable of two distinct movements, one a movement of rotation about its axis and the other a bodily movement along said axis; of mechanism to impart the bodily movement to the worm from the element whose speed is to be measured and friction means to directly rotate the worm, substantially as described.

3. In a speed-indicator, the combination with a worm mounted so as to be capable of two distinct movements, one a movement of rotation about its axis and the other a bodily movement along said axis; of mechanism to impartthe bodily movement to the worm from the element whose speed is to be measured and means to simultaneously impart rotation directly to the worm and to regulate its speed, substantially as described.

4. In a speed-indicator, the combination with a worm having a friction-wheel secured thereto and mounted so as to be capable of two distinct movements, one a movement of rotation about its axis and the other a bodily movement along said axis; of mechanism to impart bodily movement to the worm from the element whose speed is to be measured, a

friction-disk contacting with said frictionwheel to rotate the worm, an index-hand and means to position the index-hand relatively to the bodily movement of the worm and friction-wheel, substantially as described.

5. In a speed-indicator, the combination with a worm having a friction-wheel secured thereto and mounted so as to be capable of rotation about its axis and movable bodily along said axis; of mechanism to impart bodily movement to the worm from the element Whose speed is to be measured, a friction-disk contacting with said friction-wheel to rotate the worm and a recording-stylus receiving motion from the Worm, substantially as described.

6. In a speed-indicator, the combination with a worm having a friction-wheel secured thereto and mounted so as to be capable of rotation about its axis and of movement along said axis; of mechanism to impart bodily movement to the worm from the element whose speed is to be measured, a friction-disk contacting with said friction-wheel to rotate the worm, an index-hand and a stylus positioned by the bodily movement of said worm, substantially as described.

7 In a speed-indicator, the combination with a worm having a friction-wheel secured thereto and mounted so as to be capable of rotation about its axis and of movement along said axis; of mechanism to impart bodily movement to the worm from the element Whose speed is to be measured, a friction-disk contacting with the friction-wheel to rotate the worm, a spring-actuated driving mechanism to rotate the disk, mechanism to wind the spring and mechanism to move a paper strip, both operated from the element whose speed is to be measured, an index-hand and a stylus operated from the worm, substantially as described.

8. In a speed -indicator, the combination with a worm having a friction-Wheel secured thereto and mounted so as to be capable of rotation about an axis and bodily movable along said axis; of mechanism to impart bodily movement to the worm from the element whose speed is to be measured, a drum, a spring connected thereto and wound by the frictionclutch, said drum driving the friction-disk and a governor, driven from said drum to control the speed of the disk, an index-hand and a recording-stylus positioned from said worm, substantially as described.

9. In a speed -indicator, the combination with arevoluble shaft having a keyway therein, a Worm and friction-wheel secured thereto, both bodily movable along the shaft, a wormwheel to bodily move the worm, mechanism to impart rotation in one direction to said worm-wheel from the element to be measured, a friction-disk contacting with the friction-wheel, governorcontrolled mechanism to impart uniform rotation to the disk, a rack and its support reciprocated by the worm, an index-hand geared to the rack, a recordingstylus having a flexible connection to the racksupport and means to feed a strip of paper under the stylus, substantially as described.

10. In a speed-indicator, a main driving-pinion, a worm having a friction-wheel secured thereto, mechanism between the worm and pinion to bodily move the worm along its axis, a clock mechanism wound from the pinion, a friction-disk driven by the clock mechanism, a recording-stylus and an index-hand operated from the worm, a drawing-off roll operated from the pinion and a winding-on spool driven from the drawing-off roll, substantially as described.

11. In a speed-indicator,a main driving-pinion, a clockwork wound from said pinion, a friction-clutch intermediate the pinion and clockwork to prevent overwinding, a worm and a friction-wheel secured thereto, a friction-disk contacting with the wheel and driven by the clockwork, mechanism between" the worm and pinion to bodily move the worm and friction-wheels from the center toward the circumference of the disk, an index-hand and a recording-stylus moved from the Worm, and a drawing-01f roll operated from the pinion and a winding-on spool driven from the roll, substantially as described.

12. In a speed-indicator, a Worm having a friction-wheel secured thereto, mechanism to move the Worm and wheel bodily along their axes, a friction-disk spring-held against the Wheel, mechanism to uniformly rotate the disk, a sliding bracket, between the arms of which said Worm and Wheel are located, a rack and a stop on said bracket, an index-hand geared to the rack, a drum and a toothed wheel thereon, a chain connecting the drum to the bracket, a yoke, a rack on one leg thereof engaged by the toothed wheel, a stylus on the other leg, studs at the periphery of the disk to engage the stop on the bracket and mechanism to cause a strip of paper to travel under the stylus, substantially as described.

13. In a speed-indicator, the combination with a Worm having a milled steel friction- Wheel secured thereto; of mechanism operated from the element whose speed is to be measured to move said worm and wheel along its axis and a steel friction-disk having a milled surface contacting with said Wheel to rotate the worm and friction-wheel, substantially as described.

1 1. In a speed-indicator, a worm moved in one direction from the element Whose speed is to be measured, an independent mechanism to cause the worm to move in an opposite direction at the same rate of speed, and an indicator having a movement difl'erent from the worm and a recorder, both the indicator and the recorder actuated from the worm, substantially as described.

15. In a speed-indicator, a worm moved in one direction along its axis from the element Whose speed is to be measured and mechanism independent of the speed of the element Whose speed is to be measured to move the Worm in an opposite direction, a record-striprnoving mechanism and an indicator and a recorder both moved from the Worm, substantially as described.

16. In a speed-indicator, a worm, mechanism to move the worm in one direction along its axis and elements having cooperating milled metallic surfaces to move the worm in an opposite direction at an equal rate of speed, and an index-hand moved from the Worm, as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing Witnesses.

JULIUS HEYDE.

Witnesses:

LOUIS SCHMASSMANN, F. LEHMANN. 

